..if you loosen the bedding screw(s) a little a a time and find a big shift in impact, would be better to bed. If tightening up the bedding screws "tweak" the action, then it's very likely to shoot oddly when oddly stressed.
But if it's not jumping around all over the place as you back the bedding screw out 1/8 a turn at a time, then it's probably not going to help to bed it.
I found it helped keep the POI from shifting as much.
May 1 2010, 10:02 PM
Devcon 2ton epoxy was used, mostly because it has a 30 minute work time, is thin, and I am familiar with using it. JB weld or some other high strength epoxy would work as well. I still see some POI shifts which I think is bedding and plan to eventually add more epoxy.
My situation was one where two or three shots were in the same hole, then a .25" shift and two more in another hole at ~22 yards. Also, the action was very hard to remove from the stock. So, part of the stock was sanded away where it bound at the trigger housing. A very thin layer of epoxy was added between the air gauge to the back of the action.
It helped and was very simple to apply. I used spray crisco and reseated the action after a couple of hours then again after eight hours. Only one screw holds the action in the stock in and there is no steel pillar. To achieve consistent target grade accuracy, I think some bedding is needed.
Keep an eye on the shroud, shround end cap, and baffles.
May 3 2010, 8:33 PM
They seem to influence the POI. I haven't figured out what is going on with those. But after trying multiple barrels, something about the shroud end cap affects POI and groups.
Single hole (~ 0.1" ctc) groups can be shot at 22 yards, but not consistently. I think some of the flyers are linked to the shroud because some of the best groups happen after talking off the end cap and changing the number of thread turns. Before epoxy bedding, the best groups were .3" ctc.
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